95ee221ea8
Nothing in flang has produced fir.array_load, fir.array_fetch, fir.array_update, fir.array_modify, fir.array_access, fir.array_amend, or fir.array_merge_store since the legacy (non-HLFIR) expression lowering was deleted (#210385, #210621, #210639, #210873), and the array-value-copy pass that legalized them is gone (#211816, #212643). Delete the operations and the surface that existed only for them: - FIROps.td: the "Array value operations" section including the copy-in/copy-out design comment; FIROps.cpp: the ops verifiers, effects and getExtents. fir.array_coor is unrelated and stays, as does the validTypeParams helper shared with fir.pack_array. - Tests: the ops roundtrip/verifier blocks in fir-ops.fir and invalid.fir; scaffolding rewrites in inline-elemental.fir (store via hlfir.designate; hlfir.apply-in-do_loop coverage preserved), loop-versioning.fir @test4 (the versioned loops are untouched), and simplifyintrinsics.fir (inert copy-back loops dropped; no CHECK lines affected). - Docs: FIRArrayOperations.md (+ the index.md toctree line); past-tense updates in HighLevelFIR.md; a stale comment in MutableBox.h; a release-note entry recording the removal for downstream projects. FIRLangRef is generated from FIROps.td and follows automatically. Assisted-by: AI |
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| unittests | ||
| .clang-format | ||
| .clang-tidy | ||
| .drone.star | ||
| .gitignore | ||
| CMakeLists.txt | ||
| LICENSE.TXT | ||
| Maintainers.md | ||
| README.md | ||
Flang
Flang is a ground-up implementation of a Fortran front end written in modern C++. It started off as the f18 project (https://github.com/flang-compiler/f18) with an aim to replace the previous flang project (https://github.com/flang-compiler/flang) and address its various deficiencies. F18 was subsequently accepted into the LLVM project and rechristened as Flang.
Please note that flang is not ready yet for production usage.
Getting Started
Read more about flang in the docs directory. Start with the compiler overview.
To better understand Fortran as a language and the specific grammar accepted by flang, read Fortran For C Programmers and flang's specifications of the Fortran grammar and the OpenMP grammar.
Treatment of language extensions is covered in this document.
To understand the compilers handling of intrinsics, see the discussion of intrinsics.
To understand how a flang program communicates with libraries at runtime, see the discussion of runtime descriptors.
If you're interested in contributing to the compiler, read the style guide and also review how flang uses modern C++ features.
If you are interested in writing new documentation, follow LLVM's Markdown style guide.
Consult the Getting Started with Flang for information on building and running flang.